13440651 has 12 divisors (see below), whose sum is σ = 20846952. Its totient is φ = 7680288.

The previous prime is 13440617. The next prime is 13440653. The reversal of 13440651 is 15604431.

13440651 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13440651 - 2⁶ = 13440587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13440653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45570 + ... + 45863.

It is an arithmetic number, because the mean of its divisors is an integer number (1737246).

Almost surely, 2^13440651 is an apocalyptic number.

13440651 is a deficient number, since it is larger than the sum of its proper divisors (7406301).

13440651 is an equidigital number, since it uses as much as digits as its factorization.

13440651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91450 (or 91443 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 13440651 is about 3666.1493422936. The cubic root of 13440651 is about 237.7607168315.

The spelling of 13440651 in words is "thirteen million, four hundred forty thousand, six hundred fifty-one".